import Vue from 'vue'
import Router from 'vue-router'
import Login from './components/Login.vue'
import Home from './components/Home.vue'
import Welcome from './components/Welcome.vue'
import Users from './components/user/User.vue'
import Rights from './components/power/Rights.vue'


import Roles from './components/power/Roles.vue'
import Params from './components/goods/Params.vue'
import Cate from './components/goods/Cate.vue'
import GoodsList from './components/goods/List.vue'
import Report from './components/report/Report.vue'

Vue.use(Router)

const router = new Router({
  
  routes: [
    {path: '/', redirect: '/login'},
    {path: '/login', component: Login},
    {
      path: '/home',
      component: Home,
      redirect:'/welcome',
      children:[
        {path: '/welcome', component:Welcome},
        {path: '/users', component:Users},
        {path:'/rights',component:Rights},
        { path: '/roles', component: Roles },
        { path: '/goods', component: GoodsList },
        { path: '/categories', component: Cate },
        { path: '/params', component: Params },
        { path: '/reports', component: Report }
      ]
    }
  ]
})
//添加路由守卫
//如果没有登录，不能访问/home,如果通过url地址直接访问，则强制跳转到登录页面
//挂载路由导航守卫
router.beforeEach((to,from,next) => {
  //to将要访问的路径
  //from从哪个路径跳转
  //next是一个函数，表示放行
  // 1. next()---放行      2.next('/login')--强制跳转
  if(to.path === '/login') return next()
  //获取token--通过键
  const tokenStr = window.sessionStorage.getItem('token')
  if(!tokenStr) return next('/Login')
  next()
})

export default router